Guy- you've GOTTA install body panels before you paint them! If you don't, you've gotta half screw up the paint when you actually install them! LOL! Not to mention that if you get some aftermarket fiberglass and you don't let it get exposed to the elements (outdoors in sun with no paint yet) the resins in the glass won't completely harden, and paint will look like crap, and you'll be more prone to cracking, chipping, etc...
Give the kid a break, man!! LOL! <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/sly.gif" border="0" valign="absmiddle" alt=':sly:'>